1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
2 | #ifndef LINUX_MMC_IOCTL_H |
3 | #define LINUX_MMC_IOCTL_H |
4 | |
5 | #include <linux/types.h> |
6 | #include <linux/major.h> |
7 | |
8 | struct mmc_ioc_cmd { |
9 | /* |
10 | * Direction of data: nonzero = write, zero = read. |
11 | * Bit 31 selects 'Reliable Write' for RPMB. |
12 | */ |
13 | int write_flag; |
14 | |
15 | /* Application-specific command. true = precede with CMD55 */ |
16 | int is_acmd; |
17 | |
18 | __u32 opcode; |
19 | __u32 arg; |
20 | __u32 response[4]; /* CMD response */ |
21 | unsigned int flags; |
22 | unsigned int blksz; |
23 | unsigned int blocks; |
24 | |
25 | /* |
26 | * Sleep at least postsleep_min_us useconds, and at most |
27 | * postsleep_max_us useconds *after* issuing command. Needed for |
28 | * some read commands for which cards have no other way of indicating |
29 | * they're ready for the next command (i.e. there is no equivalent of |
30 | * a "busy" indicator for read operations). |
31 | */ |
32 | unsigned int postsleep_min_us; |
33 | unsigned int postsleep_max_us; |
34 | |
35 | /* |
36 | * Override driver-computed timeouts. Note the difference in units! |
37 | */ |
38 | unsigned int data_timeout_ns; |
39 | unsigned int cmd_timeout_ms; |
40 | |
41 | /* |
42 | * For 64-bit machines, the next member, ``__u64 data_ptr``, wants to |
43 | * be 8-byte aligned. Make sure this struct is the same size when |
44 | * built for 32-bit. |
45 | */ |
46 | __u32 __pad; |
47 | |
48 | /* DAT buffer */ |
49 | __u64 data_ptr; |
50 | }; |
51 | #define mmc_ioc_cmd_set_data(ic, ptr) ic.data_ptr = (__u64)(unsigned long) ptr |
52 | |
53 | /** |
54 | * struct mmc_ioc_multi_cmd - multi command information |
55 | * @num_of_cmds: Number of commands to send. Must be equal to or less than |
56 | * MMC_IOC_MAX_CMDS. |
57 | * @cmds: Array of commands with length equal to 'num_of_cmds' |
58 | */ |
59 | struct mmc_ioc_multi_cmd { |
60 | __u64 num_of_cmds; |
61 | struct mmc_ioc_cmd cmds[]; |
62 | }; |
63 | |
64 | #define MMC_IOC_CMD _IOWR(MMC_BLOCK_MAJOR, 0, struct mmc_ioc_cmd) |
65 | /* |
66 | * MMC_IOC_MULTI_CMD: Used to send an array of MMC commands described by |
67 | * the structure mmc_ioc_multi_cmd. The MMC driver will issue all |
68 | * commands in array in sequence to card. |
69 | */ |
70 | #define MMC_IOC_MULTI_CMD _IOWR(MMC_BLOCK_MAJOR, 1, struct mmc_ioc_multi_cmd) |
71 | /* |
72 | * Since this ioctl is only meant to enhance (and not replace) normal access |
73 | * to the mmc bus device, an upper data transfer limit of MMC_IOC_MAX_BYTES |
74 | * is enforced per ioctl call. For larger data transfers, use the normal |
75 | * block device operations. |
76 | */ |
77 | #define MMC_IOC_MAX_BYTES (512L * 1024) |
78 | #define MMC_IOC_MAX_CMDS 255 |
79 | #endif /* LINUX_MMC_IOCTL_H */ |
80 | |